Filtering apparatus.



No. 662,556. Patented N0v.127, |900.-

J. J. BFHX.

FILTERING APPARATUS.

(Applicgtion led Apr, 28,189.9.)

(No Nudel.)

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NiTfnn ESrAiits JOSEPH JOHANN BRIX, OF WTIESBADEN, GERMANY, ASSIGNOR TOALLGE- MEINE STDTEREINIGUN(Srs-GESELLSCHAFT MIT BESCIIRNKTER HAF'- TUNG,OF SAME PLACE.

FILTERING. APPARATUS.

SPECIFICATION forming para of Letters Patent No. 662,556, dated.November er, Ied.

Application filed April 28, 1899. Serial No. 714.863. (No model.)

To all whom it may concern;

Be it known that I, JOSEPH JOHANN BRIX, a subject of the German Emperor,residing at Wiesbaden, in the Province of Hesse-Nassau and Kingdom ofPrussia, Germany, have invented a new and useful Filtering Apparatus,of' which the following is a specification.

My invention relates to improvements in filtering apparatus in which arevolving drum or barrel is designed for the reception of the filteringmaterial through which the liquid to be purified is to dow in order tobe discharged through a hollow shaft or trunnion 5 and the objects ofmyimprovements are to adapt the filtering apparatus of this class formany purposes of the trade, including that of drainwater-purifying worksin towns, and to carry out the samein an exceptionally complete andeffective manner, so that while the cost of the filtering apparatus islow, the space it occupies small, and the operation simple suchapparatus is capable of dealing with large quantities of liquid. Iattain these objects by the mechanism and arrangement of partsillustrated in the accompanying drawings, in which- Figure l is avertical longitudinal section of the entire ltering apparatus; and Fig.2, a cross-section on the line l 2, Fig. l.

Similar letters refer to similar parts throughout the several views.

The filtering apparatus consists of a basin or reservoir b, which' maybe either open or closed at the top and which serves for the receptionof the liquid to be purified, a revolving drn in or barrel a, arrangedwithin the said reservoir and serving as a receiver for the filteringmaterial, such as sand, through which the liquid is to flow, and atubular chamber o arranged Within the barrel a, which receives theliquid as it is purified and discharges it through a hollow shaft ortrunnion z.

The liquid is delivered into the basin b through afeed-pipe b. It thenpasses through the perforated Wall of the barrel a, through thefiltering material, thence, after having been purified, through theperforated Wall of the tubular chamber c, and from this it is dischargedthrough the hollow truniiion During` this passage of the liquid thebarrel does not revolve.

Where the inner tubular chamber is arranged concentrically with the axisof the barrel, as indicated bydotted lines in Fig. 2, the upper part frof the tubular chamber should preferably be left unperforated, so as toprevent the liquid, after it has passed through the central layer et eta: of the filtering material when possibly it has not yet had time lo bethoroughly filtered, from entering thetubularchainberinanimpurecondition. The necessityof providing the innerchamber with an unperforated top may,hcwever, be avoided and the entiresurface of the said chamber may be used as a strainer by arranging suchchamber eccentrically to the outer barrel, as illustrated in Fig. 2, asin that case all parts of' it are sufficiently covered with filteringmaterial, its capacity being nevertheless equal to that of a concentrictubular chamber.

The fllteringbarrel is but partly filled with filtering material, anempty space being left in its upper part, so that the filtering materialmay from time to time be cleansed by a ciii'rent of liquid being sentthroughout while the barrel is rotated, it being at the same time set inmotion or agitated owing to the said empty space and friction being setup` among its parts or layers, whereby it is freed from loose particlesof impurities.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A filtering apparatus comprising an outer and an inner chamber, bothhaving perforated walls, said inner chamber eccentric to the outerchamber and the latter partly filled with filtering material; incombination with a reservoir for the liquid to be filtered in which saidfilter is mounted so as to be immersed in the liquid therein, for thepurpose set forth.

2. A filtering apparatus comprising a drum having perforated peripheralwalls, an internal chamber having likewise perforated peripheral walls,the space between said drum and chamber partly filled with a granularfiltering material, said drum having journals one of which is tubularand in communication with the internal chamber; in combination with areservoir for the liquid to be lered,'through one of the Walls of Whichthe aforesaid tubular journal projects and in which reservoir theaforesaid ilter is revolui bly mounted so as to be immersed in theliquid therein, and means for feeding a cleans'- ing liquidfto-bbereservoir ab a point belor the filter, for the purpose set forth.

JOSEPH JOHANN BRIX. Witnesses:

JEAN GRUND, SIMON WOLFGANG HANAUER.

